i seriously considered this a while back. best place to buy parts-FLEABAY. no doubt about it you can get whole stampede rears for $25. i would have done this too if my setup wouldn't have cost of $500. lets just say i wanted a quark 125a, 5s lipo, and one big motor. hehehe (i wanted to break 70mph)

but i gave up on it after i saw the estimated cost.

basically the desert storm is a 4 seater sand rail and the sand fire is a 2 seater dune buggy. personally i would get the desert storm because it will be more stable and it won't wheelie as easy. (with that much traction it's almost too easy)